The correct answer is C. Uncontrolled mitosis.
Cancer is a disease caused by the uncontrolled growth of abnormal cells. These cells can divide and grow rapidly, and they can also spread to other parts of the body. Cancer can be caused by a number of factors, including genetic mutations, environmental toxins, and lifestyle choices.
Uncontrolled mitosis is the process by which cancer cells divide and grow. In normal cells, mitosis is a tightly regulated process that ensures that only the correct number of cells are produced. However, in cancer cells, mitosis is uncontrolled, and this leads to the uncontrolled growth of cancer cells.
A. Loss of immunity of cells is not a cause of cancer. In fact, the immune system plays an important role in fighting cancer. The immune system can recognize and destroy cancer cells, but cancer cells can sometimes evade the immune system.
B. Uncontrolled meiosis is not a cause of cancer. Meiosis is the process of cell division that produces gametes (eggs or sperm). Cancer cells do not undergo meiosis.
D. Rupturing of cells is not a cause of cancer. Rupturing of cells can occur as a result of cancer, but it is not the cause of cancer.
In conclusion, the correct answer is C. Uncontrolled mitosis.